Professor Stephen Hawking says he is planning to travel into space on Richard Branson's Virgin Galactic.

The physicist and cosmologist, 75, said he had not expected to have the opportunity to experience space but that the Virgin boss had offered him a seat.

Discussing the meaning of happiness on Good Morning Britain, he said: "My three children have brought me great joy.

"And I can tell you what will make me happy, to travel in space.

"I thought no one would take me but Richard Branson has offered me a seat on Virgin Galactic, and I said yes immediately."

Branson's spaceflight company hopes to send people to space on commercial missions. In 2015, he said Stephen Hawking was one of the people he "admired most in the world", adding he was the only person with a free ticket on board Virgin Galactic.

Professor Hawking also shared his views on US President Donald Trump during the interview.